K.N. Tu
Materials Science and Engineering: A
Polyimides can undergo reversible electrochemical reduction/oxidation reactions. The electroactive centers have been identified as involving the aromatic-carbonyl π-system of the imide functional groups. The aromatic structure and substitution on the imide moiety affects the redox potentials. The reduced (radical-anion and dianion) forms are stable and have strong absorbances in the visible spectral region. The degree of electronic transmission through the imide nitrogen for one- and two-electron reductions has been investigated using a Hammett (σ) correlation. Delocalization of excess electron density in reduced imides has been studied using FTIR and UV-Vis spectroscopy. © 1990, The Electrochemical Society, Inc. All rights reserved.
K.N. Tu
Materials Science and Engineering: A
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Physica A: Statistical Mechanics and its Applications
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Macromolecules
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MRS Spring 2000